#define  _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
int main()
{
	int i, t;
	t = 1;
	i = 2;
	while(i<=5)
	{
		t = t * i;
		i = i + 1;
	}
	printf("%d\n", t);
	return 0;

}